On the snakes not taking live. Have you tried fresh gassed/killed yet? Do the zombie dance with it so the snakes know it's there, then just leave it. This would be feeding at night.
On none eating snakes it's:
Leave them alone for 7 days.
Offer a smaller sized prey.
Never fails ASF. Smelly males work best for some reason. (Check Craigs list an other forums for them. If you post a general location we might be able to hook you up.)
My ASF breed way better then my rats. If I didn't have Boas I wouldn't have rats or rabbits.
Good luck!